Forging is of all times, before metal was used there was already a flint blacksmith. Sharp objects were made from flint, such as knives, axes and drawbars. These objects were later made from bronze and then from iron and steel.
Come and have a look at the flint blacksmith, the bronze founder, the iron makers and the "ordinary" blacksmith. They also work with tin and silver, because not all blacksmiths made tools.